Eukaryotic clade comprising opisthokonts, Breviata, and apousomonads

<span class="mw-page-title-main">Obazoa</span>

Obazoa

<p><b>Obazoa</b> (Brown et al., 2013)<span class="mw-ref reference" id="cite_ref-Brown2013_1-0"><a href="#cite_note-Brown2013-1" style="counter-reset: mw-Ref 1;"><span class="mw-reflink-text">[1]</span></a></span> is a proposed sister <a href="/en/Clade" title="Clade" class="wl">clade</a> of <a href="/en/Amoebozoa" title="Amoebozoa" class="wl">Amoebozoa</a> (which together form <a href="/en/Amorphea" title="Amorphea" class="wl">Amorphea</a>). Obazoa is composed of <a href="/en/Breviatea" title="Breviatea" class="wl">Breviatea</a>, <a href="/en/Apusomonadida" title="Apusomonadida" class="wl">Apusomonadida</a> and <a href="/en/Opisthokont" title="Opisthokont" class="wl">Opisthokonta</a>. The term Obazoa is based on the OBA <a href="/en/Acronym" title="Acronym" class="wl">acronym</a> for <b>O</b>pisthokonta, <b>B</b>reviatea, and <b>A</b>pusomonadida.<span class="mw-ref reference" id="cite_ref-Brown2013_1-1"><a href="#cite_note-Brown2013-1" style="counter-reset: mw-Ref 1;"><span class="mw-reflink-text">[1]</span></a></span></p>

<div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none" about="#mwt1">Eukaryotic clade comprising opisthokonts, Breviata, and apousomonads</div>
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</span><div class='mobile-collapse'><header class="mobile-collapse-header mobile-collapse-btn"><b>Quick facts: Obazoa Temporal range  Late Stenian - Present...</b> <span class='arrow'>▼</span></header> <table class="infobox biota mobile-collapse-element" style="text-align: left; width: 200px; font-size: 100%">
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<th colspan="2" style="text-align: center; background-color: rgb(245,215,255)" class="notheme">Obazoa<br><div style="font-size: 85%;">Temporal range: Late <a href="/en/Stenian" title="Stenian" class="wl">Stenian</a> - <a href="/en/Holocene" title="Holocene" class="wl">Present</a>, <div class="noprint"><span style="display:inline-block;">1031.4–0<span>&nbsp;</span>Ma</span> <div id="Timeline-row" style="margin: 4px auto 0; clear:both; width:250px; padding:0px; height:18px; overflow:visible; border:1px #666; border-style:solid none; font-size:small; position:relative; z-index:0;">
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<div style="position:absolute; height:6px; text-align:center; background-color:rgb(154,217,221); left:220.50773980251px; width:29.492260197491px;" class="notheme"><a href="/en/Phanerozoic" title="Phanerozoic" class="wl"><span style="color:black;">Pha.</span></a></div>
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<div style="position:absolute; height:6px; text-align:center; background-color:rgb(247,53,99); left:113.15766426554px; width:107.35007553697px;" class="notheme"><a href="/en/Proterozoic" title="Proterozoic" class="wl"><span style="color:black;">Proterozoic</span></a></div>
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<div style="position:absolute; height:6px; text-align:center; background-color:rgb(240,4,127); left:31.052262824864px; width:82.105401440676px;" class="notheme"><a href="/en/Archean" title="Archean" class="wl"><span style="color:black;">Archean</span></a></div>
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<div style="position:absolute; height:6px; text-align:center; background-color:rgb(174,2,126); left:0px; width:31.052262824864px;" class="notheme"><a href="/en/Hadean" title="Hadean" class="wl"><span style="color:white;">Had'n</span></a></div>
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<td colspan="2" style="text-align: center"><span class="mw-default-size"><a href="/en/File:Cronoflagelado2.jpg" class="mw-file-description image media-thumb" data-hash="File:Cronoflagelado2.jpg"><img loading="lazy" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/86/Cronoflagelado2.jpg/220px-Cronoflagelado2.jpg" decoding="async" data-file-width="448" data-file-height="379" data-file-type="bitmap" height="186" width="220" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/86/Cronoflagelado2.jpg/330px-Cronoflagelado2.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/86/Cronoflagelado2.jpg/440px-Cronoflagelado2.jpg 2x" alt="Cronoflagelado2.jpg"></a></span></td></tr>


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<th colspan="2" style="min-width:15em; text-align: center; background-color: rgb(245,215,255)" class="notheme"><a href="/en/Taxonomy_(biology)" title="Taxonomy (biology)" class="wl">Scientific classification</a> <span class="plainlinks" style="font-size:smaller; float:right; padding-right:0.4em; margin-left:-3em;"><span class="mw-default-size"><a href="/en/Template:Taxonomy/Obazoa" title="e" class="image wl"><img loading="lazy"alt="e" src="//upload.wikimedia.org/wikipedia/commons/7/74/Red_Pencil_Icon.png" decoding="async" data-file-width="16" data-file-height="16" data-file-type="bitmap" height="16" width="16"></a></span></span></th></tr>
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<td>(unranked):</td>
<td><a href="/en/Amorphea" title="Amorphea" class="wl">Amorphea</a></td></tr>
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<td><i>Clade</i>:</td>
<td><a href="/en/Obazoa" title="Obazoa" class="wl">Obazoa</a><br><small>Brown, 2013</small></td></tr>



































































































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<th colspan="2" style="text-align: center; background-color: rgb(245,215,255)" class="notheme">Clades</th></tr>
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<ul><li><a href="/en/Breviatea" title="Breviatea" class="wl">Breviatea</a></li>
<li><a href="/en/Apusomonadida" title="Apusomonadida" class="wl">Apusomonadida</a></li>
<li><a href="/en/Opisthokonts" title="Opisthokonts" class="mw-redirect wl">Opisthokonts</a></li></ul>
<p><b>sister:</b> <a href="/en/Amoebozoa" title="Amoebozoa" class="wl">Amoebozoa</a></p></td></tr>

















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<p>Determining the placement of Breviatea and Apusomonadida and their properties is of interest for the development of the opisthokonts in which the main lineages of <a href="/en/Animal" title="Animal" class="wl">animals</a> and <a href="/en/Fungus" title="Fungus" class="wl">fungi</a> emerged.<span class="mw-ref reference" id="cite_ref-Brown2013_1-2"><a href="#cite_note-Brown2013-1" style="counter-reset: mw-Ref 1;"><span class="mw-reflink-text">[1]</span></a></span> The relationships among opisthokonts, breviates and apusomonads are not conclusively resolved (as of 2018), though Breviatea is usually inferred to be the most basal of the three lineages.<span class="mw-ref reference" id="cite_ref-2"><a href="#cite_note-2" style="counter-reset: mw-Ref 2;"><span class="mw-reflink-text">[2]</span></a></span><span class="mw-ref reference" id="cite_ref-3"><a href="#cite_note-3" style="counter-reset: mw-Ref 3;"><span class="mw-reflink-text">[3]</span></a></span><span class="mw-ref reference" id="cite_ref-4"><a href="#cite_note-4" style="counter-reset: mw-Ref 4;"><span class="mw-reflink-text">[4]</span></a></span><span class="mw-ref reference" id="cite_ref-pmid19340985_5-0"><a href="#cite_note-pmid19340985-5" style="counter-reset: mw-Ref 5;"><span class="mw-reflink-text">[5]</span></a></span><span class="mw-ref reference" id="cite_ref-6"><a href="#cite_note-6" style="counter-reset: mw-Ref 6;"><span class="mw-reflink-text">[6]</span></a></span> Ribosomal RNA phylogenies do not usually recover Obazoa as a clade (see for example:<span class="mw-ref reference" id="cite_ref-7"><a href="#cite_note-7" style="counter-reset: mw-Ref 7;"><span class="mw-reflink-text">[7]</span></a></span>), probably reflecting their stemming from a very ancient common ancestor, and little <a href="/en/Phylogenetic_signal" title="Phylogenetic signal" class="wl">phylogenetic signal</a> remains in datasets consisting of one or a few genes.</p>
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Obazoa  Determining the placement of Breviatea and Apusomonadida and their properties is of interest for the development of the opisthokonts in which the main lineages of animals and fungi emerged. Ribosomal RNA phylogenies do not usually recover Obazoa as a clade , probably reflecting their stemming from a very ancient common ancestor, and little phylogenetic signal remains in datasets consisting of one or a few genes. 